predicate_ids[]= param to data attributes filter

app/controllers/data_attributes_controller.rb

@@ -13,7 +13,7 @@ def index
       }
       format.json {
         @data_attributes = Queries::DataAttribute::Filter.new(params).all
-          .where(project_id: sessions_current_project_id).page(params[:page] || 1).per(500)
+          .where(project_id: sessions_current_project_id).page(params[:page] || 1).per(params[:per] || 500)
       }
     end
   end

lib/queries/data_attribute/filter.rb

@@ -13,6 +13,8 @@ class Filter
       # Params specific to DataAttribute
       attr_accessor :value, :controlled_vocabulary_term_id, :import_predicate, :type, :object_global_id, :attribute_subject_type
 
+      attr_accessor :predicate_ids # alias for controlled_vocabulary_term_ids
+
       # @params params [ActionController::Parameters]
       def initialize(params)
         @value = params[:value]
@@ -22,6 +24,7 @@ def initialize(params)
 
         @attribute_subject_type = params[:attribute_subject_type]
         @object_global_id = params[:object_global_id]
+        @predicate_ids = params[:predicate_ids] || []
         @options = params
       end
 
@@ -34,6 +37,7 @@ def and_clauses
           matching_import_predicate,
           matching_attribute_subject_type,
           matching_controlled_vocabulary_term_id,
+          matching_predicate_ids,
           matching_subject
         ].compact
 
@@ -70,6 +74,11 @@ def matching_import_predicate
         import_predicate.blank? ? nil : table[:import_predicate].eq(import_predicate)
       end
 
+      # @return [Arel::Node, nil]
+      def matching_predicate_ids
+        predicate_ids.empty? ? nil : table[:controlled_vocabulary_term_id].eq_any(predicate_ids) # meh, missmatched variable
+      end
+
       # @return [Arel::Node, nil]
       def matching_type
         type.blank? ? nil : table[:type].eq(type)
@@ -95,7 +104,7 @@ def all
         if _a = and_clauses
           ::DataAttribute.where(and_clauses)
         else
-          ::DataAttribute.none
+          ::DataAttribute.all
         end
       end